{"npi":"1912964321","type":"NPI-1","status":"active","name":{"display":"Dan Tilles M.D.","other":[],"first":"DAN","last":"TILLES","middle":"S","credential":"M.D."},"specialty":{"primary_taxonomy":"207R00000X","primary_taxonomy_description":"Internal Medicine","slug":"internal-medicine","schema_org_specialty":"Internal","all":[{"code":"207R00000X","description":"Internal Medicine","primary":true,"state":"MA","license":"45946"}]},"addresses":[{"purpose":"LOCATION","street_1":"86 BAKER AVE EXTENSION","city":"CONCORD","state":"MA","postal_code":"017422125","country_code":"US","phone":"9782879300","fax":"9782879357"},{"purpose":"MAILING","street_1":"147 MILK ST","city":"BOSTON","state":"MA","postal_code":"021094806","country_code":"US","street_2":"PROVIDER ENROLLMENT - 9TH FLOOR","phone":"6175598374"}],"license":{"state":"MA","number":"45946"},"identifiers":[{"type_code":"05","label":"Medicaid","value":"0172723","state":"MA","issuer":null},{"type_code":"01","label":"Other","value":"J07305","state":"MA","issuer":"BLUE CROSS"},{"type_code":"01","label":"Other","value":"65067","state":"MA","issuer":"HARVARD PILGRIM"},{"type_code":"01","label":"Other","value":"006170","state":"MA","issuer":"NEIGHBORHOOD HEALTH"},{"type_code":"01","label":"Other","value":"4109369","state":"MA","issuer":"AETNA"},{"type_code":"01","label":"Other","value":"715989","state":"MA","issuer":"TUFTS"},{"type_code":"01","label":"Other","value":"B10208102","state":"MA","issuer":"CIGNA"}],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20050406001078","type_code":"14-11","type_desc":"PRACTITIONER - INTERNAL MEDICINE","state":"MA","pac_id":"3476500976"}]},"enumeration_date":"2006-04-28","last_updated":"2011-05-26","_meta":{"source":"NPPES","snapshot_date":"2011-05-26","doc_url":"https://findmynpi.com/api"}}